Observation 59378: Tolypocladium longisegmentum (Ginns) Quandt, Kepler & Spatafora

When: 2010-11-20

Collection location: Luzerne Co., Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

Specimen available

Mossy ground under oak along edge of lake.

Proposed Names

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Looking at this again…
By: Dave W (Dave W)
2012-10-23 21:23:00 CDT (-0400)

and realizing that the measurements seen with my scope need to be increased by about 17%, the spore segments appear to all be over 20 mu with some significantly larger than 30 mu. Combined with the dark glossy caps (see discussion) I think longisegmentis is a good name for this collection.

Thanks Irene.
By: Dave W (Dave W)
2010-11-27 11:44:15 CST (-0500)

The link you provided for Cordyceps.us contained a PDF that I was able to download and print. I had tried to get the report from the E. longisegmentis page, without success.

I’m still not certain why this one is not E. capitata. But now I’ve got the “Typification” report printed out. I’ll read it soon.

Thanks to everyone who commented and helped lead me and my old hand-me-down 400x scope on yet another excellent MO experience!

Great job!
By: Irene Andersson (irenea)
2010-11-27 04:55:59 CST (-0500)

The spore picture makes me still beleive that we are dealing with a form of longisegmentis.
All detailed pictures of spore parts from capitata show swollen ends, and this has tapering ends (and the glossy head is a longisegmentis-character).

Kautmanová & Kautman in “Cordyceps rouxii (Ascomycetes, Clavicipitales) in Slovakia and Czech Republic, with notes to distribution, ecology and taxonomy”, compared the new species with capitata and longisegmentis.
They did a revision of most collections of capitata and longisegmentis in european herbaria, and found a large difference in spore lengths of longisegmentis, and stated that the problems concerning the capitata/longisegmentis group still wasn’t solved..

One important character in longisegmentis (vs capitata), is the palisade structure in the surface of the stroma. Very good pictures to compare with can be found at http://www.indianamushrooms.com Choose “Elaphocordyceps Fungi” and longisegmentis. They also show spore parts with tapering ends.

PS. You’ll find “Typification of Cordyceps” at http://cordyceps.us Look at “Species” then “Elaphocordyceps capitata”, and a link to the pdf is there.

Segments appear
By: Dave W (Dave W)
2010-11-27 02:58:07 CST (-0500)

to be in the 15-30 mu range, seemingly too short for longisegmentis. Spore shot is from a print. Last two scope shots are of stuff scraped from cap surface. Next to last scope pic shows what I think is a chunk of perithecium. Macro shot of cap shows (perithecia?) extending like long hairs. Maybe the last two scope pics each show one of the hairs?

There was one fruit body which initially escaped our attention left behind. Returned and found this one for scope shots.

I could not find the “Typification of Cordyceps” publication anywhere online.

Both Arora and Lincoff mention that the range of cap color for capitata includes black… But maybe these were each written before longisegmentis was split off?

By: Noah Siegel (Noah)
2010-11-23 13:07:28 CST (-0500)

Typification of Cordyceps canadensis and C. capitata, and a new species C. longisegmentis.
Mycologia, Volume 80, Issue 2, p.217-222 (1988)
And you will find it.

Ascospore segments should be 20-50µm long for longisegmentis and 15-25µm for caperata

Both Irene’s and Walt’s links
By: Dave W (Dave W)
2010-11-23 12:43:17 CST (-0500)

lead one to a destination for which the message “page not found” appears. But on the top of the page, one may click on the “Cordyceps.US” banner, and the website is then accessed.

I have two of the dried specimens. Is there anything in particular I may look for using my 400x scope? I’ll stop by the collection site either today or tomorrow and see if I can find another fresh one.

By: Irene Andersson (irenea)
2010-11-23 08:43:03 CST (-0500)

Perhaps you found that it was the same link and gave the same result..
But the site is a nice one, and useful once you get there :-)

By: walt sturgeon (Mycowalt)
2010-11-22 16:03:35 CST (-0500)

I could not open your link but here is the original description.
http://cordyceps.us/files/Ginns%201988.pdf The shiny cap was mentioned. This is a synonym for E. canadensis. Not much macro info to go on except the shiny cap.

My use of the word
By: Dave W (Dave W)
2010-11-22 14:19:46 CST (-0500)

“tuber” is perhaps misguided. To clarify, I mean the rotund brownish underground growth seen attached to two of the specimens in the photos.

I hope
By: Daniel B. Wheeler (Tuberale)
2010-11-22 13:56:21 CST (-0500)

Dave’s comment regarding a lack of tuber was a reference to Elaphomyces. I know of no Elaphocordyceps associated with Tuber.

Elaphomyces can produce perhaps 100 per cubic foot, and can be found at considerable depth. So there could material at over a foot below the surface.

Material attached to sporocarp looks more like Elaphomyces granulatus than E. muricatus in my experience. But it would be nice to have a separate collection of just Elaphomyces if possible. There appear to be a goodly number of different species which have been lumped into either E. granulatus (no spores within the peridium) or E. muricatus (spores present in the peridium). I think the genus is in need of revision.

By: Dave W (Dave W)
2010-11-22 13:18:48 CST (-0500)

The very split second that I downgraded my proposal to “promising” two other “I’d call it” votes apparently came in!

Material I have previously IDed
By: Dave W (Dave W)
2010-11-22 13:17:09 CST (-0500)

as capitata did have a lighter brown colored non – shiny cap.

I saved these and will dry them out properly if anyone is interested in studying one or more of them. For a few of the fruit bodies (there were about 8 altogether) I could find no buried tuber.

By: Daniel B. Wheeler (Tuberale)
2010-11-22 11:18:06 CST (-0500)

is present making Elaphocordyceps likely.

I’d like to see mycroscopy on this as well. Might be something new.

Glossy head
By: Irene Andersson (irenea)
2010-11-22 08:45:58 CST (-0500)

in longisegmentis but not in capitata, according to this paper:

By: walt sturgeon (Mycowalt)
2010-11-21 17:15:09 CST (-0500)

Macrosopic differences?

Created: 2010-11-20 22:47:59 CST (-0500)
Last modified: 2018-02-20 15:33:43 CST (-0500)
Viewed: 608 times, last viewed: 2018-04-02 22:42:12 CDT (-0400)
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